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7 November, 16:01

The cost of renting a car for a day is $0.70 per mile plus a $20 flat fee

(a) write an equation to represent this relationship. Let x be the number of miles driven and y be the total cost for the day.

(b) what does the graph of this equation form on a coordinate plain.

(c) what is the slope and the y-intercept of the graph of the relationship? explain.

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  1. 7 November, 16:18
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    a) y =.70x + 20

    -To find this, use the rate as x since it will change based on the number of miles. Since 20 is a flat fee, it can be added at the end as a constant.

    b) This graph forms a straight line.

    -This is because the answer in a is a linear equation.

    c) The slope is. 70 and the y-intercept is 20.

    -For this one, the y-intercept is always the constant at the end of the equation and the slope is the coefficient of x.
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